CHICAGO -- Columbus defender Michael Parkhurst has been added to the U.S. roster for a Feb. 1 friendly against South Korea at Carson, Calif., but Toronto midfielder Michael Bradley was not included in the 22-man group.

Michael Bradley won't be available to help the U.S. in the upcoming friendly against South Korea.

Parkhurst was acquired by the Crew on Jan. 13, the same day Toronto obtained Bradley from Roma.

U.S. coach Jurgen Klinsmann said Friday he had dropped five players who had been with the team during a training camp in California and Sao Paulo: Colorado defenders Chris Klute and Shane O'Neill; Kansas City defenders Chance Myers and Seth Sinovic; and Houston goalkeeper Tally Hall.

The U.S. team started training Jan. 6 at Carson, Calif., and shifted to Brazil for a week-and-a-half at Sao Paulo FC, the facility the Americans will use as their base during the World Cup.

After the game against South Korea, the Americans play at Ukraine on March 5, when they expect to have their full player pool available.